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Neural State-Space Model

Simulate neural state-space model in Simulink

  • Library:
  • System Identification Toolbox / Models

  • Neural state Space block

Description

Simulates neural state-space (idNeuralStateSpace) models.

Ports

Input

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Input of the neural state-space model, specified as a vector signal with as many elements as the number of inputs you specify when creating the corresponding idNeuralStateSpace object. If the idNeuralStateSpace object specified in the block dialog does not have inputs, this port does not appear.

Initial state of the neural state-space model, specified as a vector signal with as many elements as the number of states you specify when creating the corresponding idNeuralStateSpace object.

Dependencies

To enable this input port, select the initial state source parameter as External. Then, connect the port to an upstream signal supplying the value of the initial state.

Output

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Input of the neural state-space model, returned as a vector signal with as many elements as the number of outputs you specify when creating the corresponding idNeuralStateSpace object.

State of the neural state-space model, output as a vector signal with as many elements as the number of states nx that you specify when creating the corresponding idNeuralStateSpace object. These values are identical to the first nx values in the y output.

Dependencies

To enable this output port, select the Output state parameter.

State derivative or difference of the neural state-space model, output as a vector signal with as many elements as the number of states you specify when creating the corresponding idNeuralStateSpace object.

For continuous-time neural state space models, this value is the derivative of the state with respect to time. For discrete-time neural state space models, this value is the difference between the next state and the current one.

Dependencies

To enable this output port, select the Output state derivative/difference parameter.

Parameters

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Specify an idNeuralStateSpace object that defines a neural state-space system by entering the name of an idNeuralStateSpace object from the MATLAB® workspace.

Note

If you change the input/output configuration of Model in the workspace, click the ... button next to the Model edit field in the block dialog to refresh the Neural State-Space Model block.

Programmatic Use

Block Parameter: sys
Type: string, character vector
Default: ""

Specify whether to enter the initial condition directly on the dialog box or to receive the initial condition from an input port.

  • If you set Initial state source to Internal, enter the initial condition in the edit field under Initial state.

  • If you set Initial state source to External, the input port x0 is added to the block. You must then connect an upstream signal supplying the value of the initial state to the x0 input port.

Programmatic Use

Block Parameter: x0type
Type: character vector
Values: 'Internal' | 'External'
Default: 'Internal'

Specify the initial state of the neural state-space object as a vector of nx entries, where nx is the number of states in Model.

Use this parameter make sure that the system states reflect the true plant environment at the start of your simulation, to the best of your knowledge.

Programmatic Use

Block Parameter: ic
Type: string, character vector
Default: "0"

Select this parameter to add the x output port to the block. During simulation this port outputs the internal state of the idNeuralStateSpace object specified in Model.

Programmatic Use

Block Parameter: returnx
Type: string, character vector
Values: "off", "on"
Default: "off"

Select this parameter to add the dx output port to the block. During simulation this port outputs the time derivative of the internal state of the idNeuralStateSpace object specified in Model.

Programmatic Use

Block Parameter: returndx
Type: string, character vector
Values: "off", "on"
Default: "off"

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2022b